This 3-prong laboratory clamp features a PVC-coated die-cast jaw with a 90mm (3.5 inch) maximum capacity. The clamp tightens securely using a tommy-bar style thumbscrew. The overall clamp length is 10.5 inches with an 8mm (0.3 inch) diameter rod. The chemical-resistant PVC coating protects glassware from scratches and provides a slip-resistant grip. Suitable for securing flasks, beakers, and other apparatus in laboratory experiments.